Measurement and Control Solutions for the Petrochemical and Chemical Industries

The production processes in the petrochemical and chemical industries involve high temperatures, high pressures, corrosive media, and explosive substances. These conditions impose stringent requirements on the explosion-proof compliance, material compatibility, and long-term stability of measurement and control instruments. As a leading supplier of measurement and automation technology, JUMO provides comprehensive solutions for the petrochemical and chemical sectors, covering explosion-proof selection, pressure, temperature, flow, level measurement, wastewater treatment, and engineering services. **[ATEX Explosion-Proof Selection]** In accordance with EU Directive 2014/34/EU and the IECEx system, explosive atmospheres are classified into potential zones: Gas Zones 0 (explosive gas atmosphere present continuously or for long periods), 1 (likely to occur during normal operation), and 2 (unlikely to occur during normal operation, and if it does, only for a short duration). Dust Zones 20, 21, and 22 correspond to these categories. Equipment protection types include Ex d (flameproof enclosure), Ex p (pressurized enclosure), Ex q (powder filling), Ex o (oil immersion), Ex e (increased safety), Ex ia/ib/ic (intrinsic safety), Ex n (non-sparking), Ex ma/mb/mc (encapsulated), and Ex t (protected by enclosures). Equipment protection levels Ga/Gb/Gc (gas) and Da/Db/Dc (dust) correspond to zone classifications. Regarding explosion groups: Group I covers mine methane; Group II covers explosive gas atmospheres, subdivided into IIA, IIB, and IIC; Group III covers dust atmospheres, subdivided into IIIA (combustible fibers), IIIB (non-conductive dust), and IIIC (conductive dust). Temperature classes T1 through T6 correspond to maximum surface temperatures of 450/300/200/135/100/85°C, which must remain below the ignition temperature range of combustible materials. **[Pressure Measurement]** JUMO has over 30 years of experience in pressure measurement. Our products offer high accuracy, optional ATEX explosion-proof certification, optional high-temperature versions (capable of directly measuring media up to 200°C, with ATEX models reaching 170°C), and selectable operating knobs. * **JUMO dTRANS p20 and p20 Ex d Pressure Transmitters (Models 403025/403026):** Certified with ATEX markings II 1/2G Ex d IIC T6~T3 Ga/Gb and II 1/2D Ex t IIIC T105°C Da/Db. Approved by INMETRO, NEPSI, EHEDG, and DNV. Measurement ranges (relative/absolute) from 600mbar to 600bar with an accuracy of 0.05%. Features two-wire 4~20mA output with HART protocol, DC 11.5~36V supply, operating temperature -50~+85°C, IP67 stainless steel magnetic shielding, and media temperatures up to +120°C (optional +200°C). * **JUMO dTRANS p20 DELTA and DELTA Ex d Differential Pressure Transmitters (Models 403022/403023):** Differential pressure ranges from 10mbar to 600bar (Ex d model: 10mbar to 100bar), with an accuracy of 0.07%. Intrinsic safety version Ex ia IIC T4 Ga. Ideal for liquid level, flow, and process pressure measurements. * **JUMO p20Pro Series Pressure Transmitters (Model 403525):** Utilizes German high-purity single-crystal silicon sensor chips and dual Wheatstone bridge design. Offers high precision, stability, excellent environmental adaptability, explosion-proof design, convenient local display, and remote debugging support. Compatible with threaded, clamp, and flange connections. Widely applied in chemical, oil & gas, power generation, papermaking, water treatment, pharmaceutical, food & beverage, machinery manufacturing, and shipbuilding industries. * **JUMO delta p20Pro Differential Pressure Transmitter (Model 403522):** High static pressure design up to 40MPa. 4-20mA output compatible with standard protocols like HART and PROFIBUS for configuration and networking. Available in single-flange and double-flange configurations. * **JUMO dTRANS p33 Pressure Transmitter (Model 404753):** ATEX II 2G Ex ib IIC T6~T4 Gb and II 1/2D Ex ia IIIC certified. Measurement range 0.25~600bar, accuracy 0.5%, media temperature -40~+85°C (optional -40~+200°C). Includes sanitary connections and complete pressure isolator options for food and pharmaceutical industries. * **Diaphragm Seals and Isolation Capsules (Datasheets 409784/409786):** Extend the process connection to protect instruments and sensors when media is contaminated, highly viscous, prone to clogging, corrosive, toxic, or hot. When installation access is difficult, pressure is transmitted via capillary tubes filled with silicone oil. Standard material 316L, with custom diaphragm and body combinations available based on specific conditions. **[Temperature Measurement]** Temperature is a critical parameter in the petrochemical and chemical industries. Explosion-proof RTDs and thermocouples carry ATEX/IECEx certifications. Sensor sheaths come into direct contact with media subject to high wear, stress corrosion, high flow rates, and extreme temperatures. Material options and maximum operating temperatures include: 304/316/316L/316Ti/321 Stainless Steel 700~800°C, 347H 850°C, 310S and GH3030/GH3039 plus Inconel 600/Incoloy 800 1100°C, 1.4749/1.4841 1150°C, Monel alloy 600°C, Hastelloy 700°C, KANTHAL alloy 1250°C, Ceramic KER 610/710 1300/1600°C, Titanium and Tantalum 400°C, PTFE 200°C, Silicon Carbide 1700°C, and Duplex Steel 2205 315°C. Sheath structural dimensions are frequency-checked per ASME PTC 19.3 TW-2010. Deep-hole drilling follows VDI 3210 standards, with X-ray testing on both sides of the inner bore to control concentricity. Welded sheaths undergo 100% PT inspection for surface cracks; pressure-bearing sheaths also undergo RT inspection for internal defects. Hydrostatic test pressure for pressure-bearing sheath tubes is typically 60~500bar (100 times the flange rated pressure), applied for 3~15 minutes. Dial-type bimetallic thermometers and electrical contact bimetallic thermometers use thermal expansion of bimetallic spiral strips to drive pointers. Electrical contact types activate relays via contact closure/opening to achieve automatic control and alarms. Surface-mounted RTDs/thermocouples include cable-connected types (Datasheet 902550, -50~+400°C, Pt100/Pt500/Pt1000) for low heat dissipation surfaces (curved and flat); plate structures (901110/20) for reactor surface temperature measurement (-50~600°C); and knife-edge structures (901120/20) for high-performance boiler tube temperature measurement (0~800°C), with optional insulation covers. Rigid multi-point temperature measurement isolates process media from sensing elements using outer protective tubes, providing temperature indication at different intervals within the same cross-section. Various alloy steel materials suit different conditions, with optional secondary sealing chambers to detect initial pressure boundary failures. Rigid structures offer superior protection under turbulent flow conditions; conductive module solutions allow individual sensor replacement during operation. Spring-loaded options include bimetal spring loading (contacting inner wall upon thermal expansion, max 538°C), high-temperature spring loading (max rated temp 650°C), and internally supported high-temp steel spring loading (ensuring rapid response and accurate reflection of internal vessel temperatures), suitable for catalytic bed layers. Flexible multi-point temperature measurement flexibly addresses cross-shaped and radial measurement requirements over large areas. Sensors extend along the vessel wall to designated points without outer protective tubes, allowing coiled transport. Optional secondary sealing chambers enable true representation of internal vessel conditions, detecting hot spots, channeling, and uneven distribution while responding rapidly to temperature changes. Wear-resistant RTDs/thermocouples offer various surface hardening processes for demanding applications: Carburizing (~HV900), Nitriding (~HV1200), Hard Chrome Plating and Chemical Ni-P (~HV1000), Boriding (HV1300~2300), PVD/PCVD TiN/TiCN (HV2000~3000), Tungsten Carbide WC+Co (HV1200~1800), and TD Coating VC (HV2800~3200), balancing wear resistance with rapid temperature response. Temperature transmitters convert temperature variables into standard output signals through voltage regulation, filtering, operational amplification, non-linear correction, V/I conversion, constant current, and reverse protection. JUMO transmitters are developed and manufactured at our German headquarters, offering combinations of analog, smart, HART protocol, explosion-proof, and various installation formats. They are widely used in petroleum, chemical, power, metallurgy, pharmaceutical, food, and shipping industries. **JUMO safetyM Safety Temperature Limiters/Monitors (Models 701155 STB/STW Ex and 701055 exTHERM-DR):** Designed for explosion-proof zones and safety monitoring. Functions comply with SIL3 and Performance Level PLe. Certifications include GL, DIN, DGRL, SIL 3, PL e, and IPL 2. Analog inputs support L/J/U/T/K/N/S/R/B/D thermocouples and Pt100/Pt1000 RTDs, plus configurable 4~20mA outputs. Outputs include 0/4~20mA and 0~10V. Relay outputs feature pre-alarm KV and limit Alarm functions. Installed outside explosion-proof zones. Manufacturer declarations provide safety certification;配套 sensors do not require additional safety level calculations. **JUMO Wtrans B Wireless Temperature Measurement System:** Programmable wireless transmitter head-mount type (Model 707060); receiver unit (Model 902931) DIN-rail mount IP20. Suitable for RTDs, thermocouples, potentiometers, and voltage inputs. Reception frequencies 868.4MHz or 915MHz; each receiver unit connects up to 16 Wtrans probes. Outputs: 4×0(4)~20mA / 0~10V or 2×analog + 2×relay (max 3A AC 230V). RS485 interface with Modbus protocol. Dual-line LCD display with panel keys or configuration software for setting filter time, zero offset, alarms, and min/max memory per channel. Certifications include IC, FCC, and cULus, eliminating wiring costs. **[Flow and Level Measurement]** **JUMO flowTRANS MAG S01/S02 Electromagnetic Flow Meters (Models 406012/406013):** Standard pipe sizes DN3~DN2000, standard pressures PN10~PN40. Measurement accuracy is 0.4/0.3% of span (optional 0.2%). Process connections comply with DIN/EN/ASME flange standards, available in carbon steel and stainless steel. Linings include PFA/ETFE/PTFE/hard or soft rubber. Electrodes available in 1.4571/1.4539/Hastelloy C-4/Tantalum/Titanium/Pt. Maximum media temperature 130°C (higher temps require customization). Outputs include 4-20mA current, pulse, and digital input/output. Communication supports HART standard and PROFIBUS-PA. Protection ratings IP67 (NEMA 4X) and IP68. Power supply AC 100~230V or AC/DC 24V. ATEX/IECEx explosion-proof versions are currently in market preparation. Differential pressure transmitters can also be used for level and flow measurement. **[Wastewater Treatment]** Wastewater in treatment plants undergoes biological and chemical processing. Pressure, level, and flow measurement equipment applies to various wastewater scenarios. * **Aeration Tank Oxygen Supply Control:** Aeration accounts for 50%~80% of plant energy consumption. Continuously regulating oxygen content in aeration tanks saves energy. The JUMO dTRANS O2 01 two-wire transmitter provides stable and efficient measurement. * **Digestion Tank Monitoring:** Digestion temperature must be maintained at 35~37°C for bacterial survival. JUMO PROCESStemp RTD ATEX explosion-proof temperature sensors work with JUMO di308 digital displays for accurate temperature monitoring. JUMO dTRANS p02 pressure transmitters and dTRANS p33 level sensors measure pressure and actual liquid levels. * **Industrial Wastewater Treatment:** Wastewater composition depends on the industry. Paper mill wastewater contains mostly non-biodegradable organics; metal industry wastewater contains oils and heavy metals. Treated water can be reused or discharged. * **Electroplating Wastewater Treatment:** Contains zinc, iron ions, and potentially nickel and copper. Cyanide and chromate degradation in the first stage requires continuous flow. Cyanide-containing solutions require a minimum pH of 10. JUMO tecLine pH electrodes paired with JUMO AQUIS 500 pH transmitters accurately monitor plating baths and degradation processes. * **Domestic Sewage Treatment:** Filtration removes blockages and sand; aeration tanks biologically treat mixed activated sludge to degrade colloidal organic pollutants; sludge recirculation continues degradation; dissolved air flotation tanks use anaerobic microorganisms to convert organic pollutants into biogas. **[JUMO Engineering Services]** JUMO Engineering combines professional knowledge with industry experience. Engineers and technicians develop customized solutions according to specific customer requirements, providing personalized support and consultation throughout the process—from site visits and solution development to systematic production. As a full-solution systems provider, JUMO offers not only necessary equipment but also factory project planning and management. The structured process covers specification creation, execution, documentation, commissioning, and training. Service内容包括: Feasibility analysis, technical concept creation (including product requirements/responsibility matrices), project plan and documentation completion (including PLC programming/visualization/network technology), continuous project management, site commissioning, training, and support. **Customer Benefits:** As a core partner building technical system solutions, customers benefit from our team's expertise in measurement and automation equipment, global support from experienced experts, and flexible customized solutions tailored to individual needs. Accurate and timely communication channels save time and prevent errors. Comprehensive technical support minimizes downtime due to equipment maintenance.

Use Cases:Instrument selection for explosion-proof areas in petrochemical and chemical plants, pressure and temperature measurement of high-temperature corrosive media, multi-point temperature monitoring in reactors, online monitoring for wastewater treatment, and automation engineering system services.